Sewing mechanism



Nov 2, 937- M. M. NEWMAN ET AL SEWING MECHANISM Filed Aug. 14, 1936 3 Sheets-Sheet 1 Nov 2, 1937. M. M. NEWMAN ET Al.

SEWING MECHANISM Filed Au 14, 1936 3 Sheets-Sheet 2 M I NVENTORS V ORNEYS Nov 1937- M. M. NEWMAN ET AL SEWING MECHANISM Filed Aug. 14, 1936 3 Sheets-Sheet 3.

M INVENTORS BY 0/ w ATTORNEYS Patented Nov. 2, 1937 SEWING MECHANISM Max M. Newman and Morris .Opper, New York, N. Y.

Application August 14, 1936, Serial No. 95,967

7 Claims. (01. 112-174) Our invention relates to a new and improved sewingmechanism.

This application is in part a continuation of application Serial No. 34,314 filed by us in the United States Patent Office on August 2, 1935 for improvements in "Sewing mechanism.

One of the objects of our invention is to pro-' vide an improved device for duplicating a handstitch. The invention is particularly useful in sewing neckties, in order to produce the eifect of an ordinary hand-stitch, but the invention is generally applicable for making all types of sewed articles.

Another object of our invention is to provide are mounted on two endless members, said endless members being chains or belts or bands or the like. A series of crimping members which are mounted on these two endless members, crimp the piece or pieces of fabric in regular formation, and the fabric is also moved relative to a long needle which may be held stationary during the formation of the stitch. Said long needle passes through the crimped layers of fabric.

Another object of our invention is to provide a device of this typehaving a long needle which is held securely against lateral bending or shifting, during the formation of the stitch.

Other objects of our invention will be set forth in the following description and drawings, which illustrate a preferred embodiment thereof, it being understood that the above statement of the objects of our invention is intended generally to explain the same without limiting it in any manner.

Fig. 1 is a side elevation of the improved machine.

Flg. 2 is a sectional view on the line 22 of Fig. 1.

Fig. 3 is a sectional view on the line 3-3 of Fig. 1.

Fig. 4 is a sectional view on the line 4--4 of Fig. 1.

Fig. 5 is a sectional view on the line 5-5 of Fig. 2.

Fig. 6 is a detail elevation of certain of the parts which are shown in Fig. 5.

Fig. '7 is a detail elevation showing parts of .0 the endless members, the crimping members, and certain auxiliary parts. a

Fig. 8 is a'view similar to Fig. '7, but showing the parts in a different position.

Fig. 9 is a partial plan yiew showing an endless member and the attached crimping members.

improved mechanism whereby crimping members 'couldqbe usedf in place of a flexible steel band.

Fig. 10 is a sectional view on the line Ill-40 of Fig. 9.

Fig. 11 is a sectional view on the line ll-ll of Fig. 9.

Fig. 12 is a sectional view on'the line l2-l2 of 5 Fig. 1.

Fig. 13 is a plan view showing the recess in a crimping member.

Fig. 14 is a section on the line l4l4 of Fig. 13.

The parts of the device are supported upon an angular plate I, which is provided with spaced bearing lugs la and lb. vA shaft 4 is tumably mounted in the lug la, and in the vertical flange of the angular plate I. Said shaft 4 is connected to a driving member, which maybe a sprocket wheel 23 or any other suitable device, whereby said shaft 4 may be turned continuously or 'intermittently, either in the same direction, or in opposite directions.

A pulley l9 and a-sprocket wheel II are connected to the shaft 4 so as'to turn in unison with said shaft 4. The shaft 4 may have a drive fit in the bores of the pulley l9 and of the sprocket wheel l1.

A spacer may be mounted on the shaft 4.

A shaft 4a, which corresponds generally to the shaft 4, is mounted in the lug lb and in the vertical flange of the plate I. The shaft 4a is generally identical in construction with the shaft 4 save that the shaft 411 is an idler. Said shaft 4a 30 is provided with a pulley l9a, which is similar to the pulley l9, andit may also have a spacer 50.

A longitudinal bar 22 has recesses whereby it can fit loosely upon the'shaft's 4 and 4a so as to serve'as a spacer. There is suflicient clearance between the bar 22 and the members l9 and [9a, so as to permit the free turning ofthemembers l9, l9a, and i1.

An endless member I, which may be a flexible steel band, is mounted upon the members l1 and IQ of the shaft 4. The width. of said member 1 exceeds the combined width of the members l1 and I9. ,Any; suitable flexible endless member Safidendless member I is provided at its inner 45 surface with spaced lateral bars l6, which mesh with the teeth l8 of the sprocket H, which is mounted on the shaft 4. Since the shaft 4 is positively driven, the steel band 1 drives the pulley l9a and it also drives the idler shaft 4a. Said pulley l9a may have recesses which mesh with bars I 6.

An upper endless member 6 is provided, and this may also be a flexible steel band, and it has lateral spaced bars l6 at its inner surface, like gal.

located while the stitch is being made.

themember I. The upper endless member 6 is mounted on two idler pulleys 29 and 29a. Said idler pulleys and 29a are mounted upon shafts of said crimping teeth 9 is less than the total width of the band I. I

As shown in Fig. 3, the lateral bars or teeth 9 are connected to the band I by means of rivets which also enter or pass through the inner 'trans-,

verse bars I9 and said rivets are provided with heads l5. Said heads it have the same general contour asthe bars 9 and said heads [5 are countersunk in the bars 9. i

The upper endless member 6 is provided with lateral bars or teeth 9 and inner bars l9 which are connected thereto in similar manner, by similar rivets l4. 1

However, the pulleys 29 and 29a have smooth peripheries 'so that the members [6 do not act as driving members for the upper band 6.

As shown in Fig. 2, the width of the upper band 6 is slightly greater than the width of the pulleys 29 and 20a. The teeth 8 extend laterally beyond the upper band 6, so that the width of the teeth 9 is the same asthe width of the teeth 9.

The shafts 3 and 3a are provided with spacers 5|, which are of identical construction. The meshing between the teeth 9 and 8 drives the upper band 6.

' The cross sections of saidteeth 9 and 9. may be substantially triangular save for said rounded surfaces.

Hence, and as indicated in Fig. 11, each tooth 9, has walls A and B whichare inclined to each other and which make equal angles with the base of the tooth. The base of the tooth may have a width of about one quarter of an inch and the height of the tooth may also be substantially one quarter of an inch. As shown in Fig. 10, the teeth are formed with longitudinal recesses inwhich the needle N is corresponds to the position of the needle which is shown in Fig. 1'.

' The recesses of the teeth 9 are designated by the reference numeral ii. In order to form said recesses, an ordinary file can be used, and this file is first moved back and forth while it is held parallel to the base of the tooth 9. After a recess has beenthus formed to the desired depth in the inclined faces A and 13, the file is then moved to. and fro upon the inclined face A of the tooth 9, while the file is held substantially parallel to said inclined face A. This results in filing'the lnclined f'ace A to a depth which is 'greater: than the depth of filing of the other inclined face l3.

Likewise, the recess is made wider at face A than at face B.

As shown in-Fi'g. 10, the file has the usual ta-' pered contour. The filing action in a direction parallel to the face A produces a lateral wall or lateral walls inthe recess at face A, which lat'- eral walls are inclined to the axis of the needle.

The filing in a direction parallel to the inclined face A may extend to the base of the tooth, or it may stop a little short of the base of thetooth,

asabout a sixteenthof an inch.

Likewise the file may be used so as to grind away the edges of the recess l3 at the face A, so that the distance between the walls of the recess at the face A exceeds the distance between the walls of the recess at the face B.

As the teeth are moved relative to the needle, and while the needle is held stationary during the formation of the stitch, the faces A of the respective teeth 9 are first presented to the stationary needle. The additional width of the recesses at the faces A permits the needle to enter said recess without binding and the inclined lateral walls of the recess at the face A assist in causing the needle to enter the recess without any binding action. Said inclined lateral walls may be designated as the entering walls of the recesseslsince they move towards the butt end of the needle while the stitch is being made.

The needle fits quite snugly between the walls of the recess at the successive faces B, thus preventing any lateral bending or movement of the needle. Since this needle is long and flexible it is important to prevent any such lateral bending of the needle. 1

The construction of the teeth 8 is'the same as the construction of the teeth 9 in this respect.

Hence when the teeth 9 and 9 mesh at the adjacent portions of the runs of the belts 6 and which has a rectangular cross section. Said butt end 26 fits slidably in a hollow guide which also has a corresponding rectangular cross section. The guide 25 is held by means of a bracket or arm 21, to the plate. I.

The operation of the device is as follows:

- The needle N is moved until its butt end 26 abuts the right-hand side of the guide 25, .this being the position shown in Fig. 1. The needle N is suitably threaded with thread T. The material which isto be sewed is fed between the bands 6 and I, atthe right-hand side of the device shown in Fig. 1, so that the crimping teeth 8 and 9 crimp the fabric and also move it to the left, so that the needle N pierces the crimped layers of fabric.- While this is being done,..the'

of the needle abuts, the left-hand side of themember 25. This is not necessary. because the cloth pushes the needle N back almost instantly stationary during the formation of the stitch. After the fabric has been moved upon the needle up to about the pulleys [9a and 29a, or

to any desired shorter length, the operation of the machine is reversed so that the pulley 29 turns counterclockwise and the pulley l9 turns clockwise, thus moving the crimped fabric off the needle. During this movement the friction of the work on the needle moves the needle back to the position shown in Fig. 1, so that the eye of the needle is, easily accessible.

so that the needle can be considered as being As the 'work is forced oi! the needle, either.

by the action of the bands or by hand, the thread must becarried along with the fabric, was to retain the stitch. The accessibility of the eye of the fabric.

As the work is forced oil. the needle, it may be guided by the member 28.

While the needle has a limited to-and-fro movement, it is in effect stationary while the stitch is being made, as distinguished from sewing machines in which the needle is vibrated in order to make the stitch.

We claim:

1. Sewing mechanism comprising a pair of endless members, crimpers connected to said endless members and moving in unison with said endless members, the outer ends of said crimpers being separated from each other in the outer runs of said endless members, means for guiding I said endless members so that their crimpers intermesh in a portion of the runs of said endless members, said crimpers having recesses which are aligned with each other when said crimpers intermesh, a stationary needle located in said recesses, the walls of the intermeshing portions of said crimpers being sufllciently spaced from each other to permit the pleating of a piece of fabric between said intermeshing crimpers, the inner end walls of said recesses being inclined to the axis of the needle.

2. Sewing mechanism comprising a pair of endless members, crimpers connected to said endless members and moving in unison with said endless members, the outer ends of said crimpers being separated from each other in the outer runs of said endless members, means for guiding said endless members so that their crimpers intermesh in a portion of the runs of said endless members, said crimpers having recesses which are aligned with each other when said crimpers intermesh, a stationary needle located in said recesses, the walls of the intermeshing portions of said crimpers being sufliciently spaced from each other to permit the pleating of a piece of fabric between said intermeshing crimpers, the inner end walls of said recesses being inclined to the axis of the needle, said inner end-walls being parallel to each other when said crimpers intermesh. v

3. Sewing mechanism comprising a pair of endless members, crimpers connected to said endless members and moving in unison with said endless members, the outer ends of said crimpers .being separated from each other in the outer runs of .said endless members, means for guiding said endless members so that their crimpers intermesh in a portion of the runs of said endless members, said crimpers having recesses which are aligned with each other when said crimpers intermesh, a stationary needle 10- cated in said recesses, the walls of the intermeshing portions of said crimpers being sufliciently spaced from each other to permit the pleating of a piece of fabric between said intermeshing crimpers, the inner end walls of said recesses being inclined to the axis of the needle, said inner end-walls being parallel to each other when said crimpers intermesh, the needle contacting with portions of said inner end-walls.

4. Sewing mechanism comprising a pair of endless belt-like members having spaced runs and adjacent runs, crimpers connected to the runs of said endless members and moving in unison with said runs of the endless members, said crimpers being mounted so as to intermesh in the adjacent runs of said endless members, said crimpers having recesses which are aligned with each other in said adjacent runs, so that a needle can be located in said recesses, said needle being mounted movably in a direction parallel to the length thereof.

5. Sewing mechanism comprising a pair of endless members having spaced runs and adjacent runs, crimpers connected to said endless members and moving in unisonwith'said endless members, said crimpers beingmounted so as to intermesh in the adjacent runs of said endless members, said crimpers having recesses which are aligned with each other in said adjacent runs, so that aneedle can be located in said recesses, said needle being mounted so that it can be moved in a direction parallel to the length thereof in said recesses, and means operative to permit a limited free movement of said needle.

6. Sewing mechanism comprising a pair of endless members, crimpers connected to said endless members and moving in unison with said endless members, said endless members having adjacent runs in which said crimpers intermesh, said crimpers having recesses'which are aligned with each other in said adjacent rims, so that a needle can be located in said recesses, said crimners having side walls which are inclined to each other, said recesses being deeper in one of said side walls than in the other thereof.

'7. Sewing mechanism comprising a pair of endless members, crimpers connected to said endless members and moving in unison with said endless members, said endlessmembershaving adjacent runs in which said crimpers intermesh, said crimpers having recesses which are aligned with each other in said adjacentruns, so that a needle can be located in said recesses, saidrecesses being wider at their inlet ends than at their outletends.

MAX M. NEWMAN. MORRIS OPPER. 

